I work in my garage, so I drive my 2001 Lexus 430 out onto the driveway each morning and drive it back into the garage at night. The engine runs for about a minute each time. About 3 times a week I take the car out far and long enough to get the engine and oil thoroughly warmed up. Will my constant short drives in and out of the garage damage my car? Like, foul the plugs, gook up the oil, carbonize the valves, etc?
I think that you should define “long enough to get the engine and oil thoroughly warmed up”. Just how long do you mean?
If the car gets fully warmed up even once a week, that should be fine. I suspect if I worked in my garage and needed to take the car out to do that, I don’t think I would put it in there the night before. I would just leave it out.
I would worry about the exhaust system unless it is stainless. It might be on the 430 since my pedestrian Ford product has it.